Stephen Hawking has been sounding the alarm that our dear planet is facing destruction in the not too distant future. He asserts that if nuclear war doesn’t finish us off, global warning or a devastating asteroid strike surely will. Hawking maintains that we need to start leaving our doomed planet or face extinction. And he isn’t the only Debbie Downer claiming that the end is near. Elon Musk, the business magnate, inventor and futurist agrees with him. Fortunately, Mr. Musk is working on a project to save us. He has a detailed plan to put one million people on a new planet within the next one hundred years. And the heavenly body he has...